blood-brain barrier
noun
: a naturally occurring barrier created by the modification of brain capillaries (as by reduction in fenestration and formation of tight cell-to-cell contacts) that prevents many substances from leaving the blood and crossing the capillary walls into the brain tissues
Examples of blood-brain barrier in a Sentence
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Delivering drugs to the brain The blood-brain barrier is evolution’s exquisite solution to keeping noxious substances away from this most critical organ.
—
Richard J. Price, The Conversation, 15 Oct. 2025
The protein usually binds to amyloid-beta and transports it across the blood-brain barrier into the bloodstream to be eliminated.
—Mrigakshi Dixit, Interesting Engineering, 7 Oct. 2025
More recently, there has been a wireless implantable brain device that partially restores vision in some of the blind; drug delivery systems that cross the blood-brain barrier to reach cancers in the central nervous system; and gene therapies for babies born without immune systems.
—Thomas Elias, Mercury News, 7 Oct. 2025
Previous research has found that TCE, when inhaled or ingested, can easily cross the blood-brain barrier and cause damage to neurons.
—Melissa Rudy, FOXNews.com, 6 Oct. 2025
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Richard J. Price, The Conversation, 15 Oct. 2025
The protein usually binds to amyloid-beta and transports it across the blood-brain barrier into the bloodstream to be eliminated.
—Mrigakshi Dixit, Interesting Engineering, 7 Oct. 2025
More recently, there has been a wireless implantable brain device that partially restores vision in some of the blind; drug delivery systems that cross the blood-brain barrier to reach cancers in the central nervous system; and gene therapies for babies born without immune systems.
—Thomas Elias, Mercury News, 7 Oct. 2025
Previous research has found that TCE, when inhaled or ingested, can easily cross the blood-brain barrier and cause damage to neurons.
—Melissa Rudy, FOXNews.com, 6 Oct. 2025
See All Example Sentences for blood-brain barrier
Cite this Entry
“Blood-brain barrier.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/blood-brain%20barrier. Accessed 25 Oct. 2025.
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